Nomenclature of Polycyclic Compounds: Naphthalene, Biphenyl, Anthracene, Spiro, Bicyclo

The video tutorial covers the nomenclature of polycyclic structures, starting with a review of simple alkene naming. It then explores the naming conventions for naphthalene, biphenyl, and anthracene, focusing on substituent positioning and numbering schemes. The tutorial also delves into the naming of spiro and bicyclo compounds, using ChemDoodle to visualize and understand the rules. The video emphasizes the importance of finding the longest carbon chain and using the lowest set of locants for substituents.

What is the first step in naming a simple alkene?

• Identify the substituents

• Find the longest carbon chain

• Determine the number of double bonds

• Locate the functional groups

In Naphthalene, why are certain positions considered identical?

• They have the same substituents

• They are at the same distance from the center

• They are chemically inert

• They can be rotated to appear the same

What is the relationship between substituents in Ortho-phenyltoluene?

• They are separated by one carbon

• They are on the same carbon

• They are opposite each other

• They are adjacent to each other

What is the parent name for a benzene ring with two methyl groups?

• Toluene

• Phenol

• Naphthalene

• Xylene

How many phenyl rings are fused in Anthracene?

• Five

• Four

• Three

• Two

How are substituents numbered in Anthracene?

• Clockwise around the outer rings first

• Clockwise around the central ring

• Counterclockwise around the central ring

• Counterclockwise around the outer rings first

What does the term 'Spiro' refer to in Spiro compounds?

• The presence of a triple bond

• The fusion of two rings at a single atom

• The presence of a double bond

• The fusion of three rings at a single atom

In a Spiro compound, how are the rings named?

• By the type of bonds present

• By the number of substituents

• By the number of carbons in each ring

• By the functional groups attached

What is the main difference between Spiro and Bicyclo compounds?

• Spiro compounds have more rings

• Bicyclo compounds have a bridgehead carbon

• Spiro compounds have a bridgehead carbon

• Bicyclo compounds have fewer rings

In Bicyclo compounds, how is the numbering of carbons determined?

• By the number of substituents

• From largest to smallest ring

• From smallest to largest ring

• By the type of bonds present